Wall-mounted air conditioner indoor unit

ABSTRACT

A body case including a body chassis to be attached to an indoor wall face and a front cover to detachably cover the body chassis; electrical components provided on a front face portion of the body chassis inside the body case; a water-resistant box for electrical component to cover the electrical components inside the body case; and a heat exhaust port included in the body chassis on a back face side with respect to the electrical components as viewed from a front face of the body chassis are included.

CROSS-REFERENCE TO RELATED APPLICATION

The present application is a bypass-continuation of International PatentApplication No. PCT/JP2020/040049, filed Oct. 26, 2020, the entirecontents of which are incorporated herein by reference.

TECHNICAL FIELD

The present disclosure relates to a wall-mounted air conditioner indoorunit.

BACKGROUND ART

In wall-mounted air conditioner indoor units for household use, mold islikely to grow in a portion where a heat exchanger is installed, an airsupply passage portion, or the like. Therefore, there is a growingdemand for washing the interior of wall-mounted air conditioner indoorunits with water or others.

However, electrical components such as a control board are installedinside a wall-mounted air conditioner indoor unit which may lead tofailure when wetted with water or the like.

Therefore, when the interior of a wall-mounted air conditioner indoorunit is washed with water or the like, it is necessary to preventelectrical components from getting wet with water or the like.

For example, Patent Literature 1 discloses providing an electricalcomponent cover so as to prevent a washing agent from entering anelectrical component room through a ventilation port formed on the frontface of the electrical component room and adhering to an electricalcomponent itself when the interior of a housing of an indoor unit of anair conditioner is washed using the washing agent. The ventilation portis formed for cooling the interior of the electrical component room orfor detecting an indoor air temperature by a thermistor housed in theelectrical component room.

CITATION LIST Patent Literature

Patent Literature 1: JP 2002-61875 A

SUMMARY OF INVENTION Technical Problem

Since electrical components generate heat, wall-mounted air conditionerindoor units are required not only to avoid from getting wet with wateror the like when the interior of the wall-mounted air conditioner indoorunit is washed with water or the like but also to discharge the heatgenerated from the electrical components to the outside of thewall-mounted air conditioner indoor unit.

In the conventional technique as disclosed in Patent Literature 1,although the ventilation hole is formed, the ventilation hole is formedon the front face of the electrical component room, and thus there is aproblem that it is difficult to completely prevent intrusion of thewashing agent when the interior of the housing of the indoor unit iswashed while the vent hole is used as a heat exhaust port.

The present disclosure has been made to solve the above problem, and anobject of the present disclosure is to provide a wall-mounted airconditioner indoor unit that prevents electrical components from gettingwet with water or the like when the interior of the indoor unit iswashed with water or the like and allows heat generated from theelectrical components to be discharged from the interior.

Solution to Problem

A wall-mounted air conditioner indoor unit according to the presentdisclosure includes: a body case comprising a body chassis to beattached to an indoor wall face and a front cover to detachably coverthe body chassis; an electrical component provided on a front faceportion of the body chassis inside the body case; a water-resistant boxfor electrical component to cover the electrical component inside thebody case; and a heat exhaust port included in the body chassis on aback face side with respect to the electrical component as viewed from afront face of the body chassis.

Advantageous Effects of Invention

According to a wall-mounted air conditioner indoor unit of the presentdisclosure, it is possible to prevent electrical components from gettingwet with water or the like when the interior of the indoor unit iswashed with water or the like and to allow heat generated from theelectrical components to be discharged from the interior.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a diagram for explaining a configuration example of awall-mounted air conditioner indoor unit according to a firstembodiment.

FIGS. 2A and 2B include diagrams for explaining the structure of theinterior of a body case of the indoor unit according to the firstembodiment. FIG. 2A is a diagram illustrating the indoor unitillustrated in FIG. 1 with a front cover removed, and FIG. 2B is adiagram illustrating the indoor unit illustrated in FIG. 2A with awater-resistant box for electrical component further removed.

FIG. 3 is a perspective view of the indoor unit for explaining a conceptin which the water-resistant box for electrical component coverselectrical components in the first embodiment.

FIG. 4 is a diagram for explaining a concept of an example of a methodof attaching the water-resistant box for electrical component to a frontface portion of a body chassis in the first embodiment.

FIG. 5 is a cross-sectional view taken along line A-A in FIG. 2A.

FIGS. 6A and 6B include diagrams for explaining a result of comparisonbetween an example of a conventional indoor unit in which electricalcomponents are dispersedly included in a body case and an example of theindoor unit according to the first embodiment in which the electricalcomponents are collectively included in one place in the body case. FIG.6A is a diagram illustrating the interior of the body case of the indoorunit in which the electrical components are dispersedly provided in thebody case, and FIG. 6B is a diagram illustrating the interior of thebody case of the indoor unit according to the first embodiment.

DESCRIPTION OF EMBODIMENTS

Hereinafter, an embodiment of the present disclosure will be describedin detail by referring to the drawings.

First Embodiment

In a first embodiment, a wall-mounted air conditioner indoor unit isassumed to be a general wall-mounted air conditioner indoor unit used ingeneral households.

FIG. 1 is a diagram for explaining a configuration example of awall-mounted air conditioner indoor unit 1 of the first embodiment. Inthe following description, the wall-mounted air conditioner indoor unit1 is also simply referred to as an “indoor unit.”

FIG. 1 is a perspective view of the indoor unit in a state in which theindoor unit is installed on an indoor wall face. Hereinafter, the statein which the indoor unit is installed on the wall face is referred to asan “installed state.”

As illustrated in FIG. 1 , the indoor unit includes a body case 100. Thebody case 100 includes a body chassis 101 and a front cover 102detachably covering the body chassis 101. Note that the front cover 102is covering the body chassis 101 in FIG. 1 .

The body chassis 101 has a box shape and has a front face portion 101 a(see FIG. 5 to be described later), a top face portion 101 b (see FIG. 5described later), a back face portion 101 c (see FIG. 5 describedlater), and a bottom face portion 101 d (see FIG. 5 described later).

The front face portion 101 a of the body chassis 101 is a face of thebody chassis 101 that is the front face in the installed state of theindoor unit. The back face portion 101 c of the body chassis 101 is aface of the body chassis 101 facing the front face portion 101 a. Forinstalling the indoor unit, for example, the back face portion 101 c isattached to a wall face via an installation plate (not illustrated). Thetop face portion 101 b of the body chassis 101 is the top face of thebody chassis 101 in the installed state of the indoor unit. The bottomface portion 101 d of the body chassis 101 is a face of the body chassis101 facing the top face portion 101 b.

The front cover 102 is provided with a grill part as an air inletportion. The grill part forms the appearance of the front cover 102while ensuring ventilation.

An air inlet port (not illustrated) is formed in an upper portion of thefront cover 102.

Further, the front cover 102 is formed in such a manner that a lowerportion of the body case 100 is opened in a state in which the frontcover 102 covers the body chassis 101.

An air outlet port (not illustrated) is formed in an opening part formedin the lower portion of the body case 100. The direction and the size ofthe opening of the air outlet port are regulated by a vane flap 103.Note that, in FIG. 1 , the air outlet port is closed by the vane flap103.

At the right end of the air outlet port, a display unit 104 thatdisplays an operating state or the like of the indoor unit by, forexample, LEDs is provided.

FIGS. 2A and 2B include diagrams for explaining the structure of theinterior of the body case 100 in the indoor unit according to the firstembodiment. FIG. 2A is a diagram illustrating the indoor unitillustrated in FIG. 1 with the front cover 102 removed, and FIG. 2B is adiagram illustrating the indoor unit illustrated in FIG. 2A with awater-resistant box for electrical component 10 further removed.

An air supply passage extending from the air inlet port to the airoutlet port is formed inside the body case 100. In the middle of the airsupply passage, a heat exchanger 105 that exchanges heat with the indoorair, an air supply fan (not illustrated), a vane flap 103, and the likeare provided. The vane flap 103 includes horizontal airflow directionvariable vanes (not illustrated) and vertical airflow direction variablevanes (not illustrated).

Mold is likely to grow in the heat exchanger 105, the air supplypassage, or the like. They also become dirty with dust or the like inthe air.

Therefore, parts that are likely to get moldy, accumulate dirt, or thelike, such as the heat exchanger 105 or the air supply passage is formedto allow washing with water or the like. Note that a washing service orthe like removes the front cover 102 as illustrated in FIG. 2 whenwashing the heat exchanger 105, the air supply passage, or the like withwater or the like.

Inside the body case 100, a fan motor 203 for driving a blower fan, avane motor 204 for driving the horizontal airflow direction variablevanes and the vertical airflow direction variable vanes, a control board201 a, a display board 202 a, or the like are provided. Note that thecontrol board 201 a supplies, for example, electricity for driving thefan motor 203 or the vane motor 204. On the display board 202 a, forexample, LEDs are arranged, and the display board 202 a supplieselectricity for lighting the LEDs.

As illustrated in FIG. 2B, the control board 201 a is housed in acontrol board case 201 made of metal. The display board 202 a is housedin a display board case 202.

The control board 201 a generates heat. For flame prevention of thecontrol board 201 a, a control board case 201 made of metal isnecessary. Incidentally, it is defined in the design criteria that thecontrol board needs to be covered with a metal case.

The control board 201 a, the control board case 201 that houses thecontrol board 201 a, the display board 202 a, the display board case 202that houses the display board 202 a, the fan motor 203, and the vanemotor 204 are electrical components 20 that may lead to failure whenwetted with water or the like.

As illustrated in FIG. 2A, the water-resistant box for electricalcomponent 10 that covers the electrical components 20 is detachablyincluded inside the body case 100. Here, the electrical components 20are the fan motor 203, the vane motor 204, the control board 201 a, thecontrol board case 201, the display board 202 a, and the display boardcase 202. Note that, in FIG. 2A, a state in which the water-resistantbox for electrical component 10 is attached to the body chassis 101 isillustrated.

The water-resistant box for electrical component 10 is, for example,made of resin. Note that this is merely an example, and thewater-resistant box for electrical component 10 is only required to beformed of a water-resistant member.

FIG. 3 is a perspective view of the indoor unit for explaining a conceptin which the water-resistant box for electrical component 10 covers theelectrical components 20 in the first embodiment.

In FIG. 3 , for simplicity of explanation, only the water-resistant boxfor electrical component 10, the fan motor 203, the vane motor 204, thecontrol board case 201, the display board case 202, and a part of thebody chassis 101 are illustrated.

The water-resistant box for electrical component 10 is attached to thefront face portion 101 a of the body chassis 101 in such a manner thatall the electrical components 20 are entirely covered from the frontface portion 101 a side of the body chassis 101.

FIG. 4 is a diagram for explaining a concept of an example of a methodof attaching the water-resistant box for electrical component 10 to thefront face portion 101 a of the body chassis 101 in the firstembodiment.

Note that, in FIG. 4 , for simplicity of explanation, only thewater-resistant box for electrical component 10 and a portion of thefront face portion 101 a of the body chassis 101 to which thewater-resistant box for electrical component 10 is attached areillustrated.

As illustrated in FIG. 4 , the front face portion 101 a of the bodychassis 101 to which the water-resistant box for electrical component 10is attached has a recess 101 e. Although not illustrated in FIG. 4 , thecontrol board 201 a and the display board 202 a are provided on thebottom face portion of the recess 101 e while housed in the controlboard case 201 and the display board case 202, respectively (see FIG. 3).

Although not illustrated in FIG. 4 , the fan motor 203 and the vanemotor 204 are provided in the recess 101 e (see FIG. 3 ).

The water-resistant box for electrical component 10 has a box shape inwhich one face on a side, the side being attached to the front faceportion 101 a of the body chassis 101, is opened.

For example, as illustrated in FIG. 4 , the water-resistant box forelectrical component 10 is attached to the front face portion 101 a ofthe body chassis 101 by a snap-fit mechanism.

When the water-resistant box for electrical component 10 is attached tothe front face portion 101 a of the body chassis 101, two protrusions 10a (see 402 in FIG. 4 ) formed in the water-resistant box for electricalcomponent 10 are caught by two respective holes 10 b included in thebody chassis 101 by snap-fitting. As a result, a state in which thewater-resistant box for electrical component 10 is attached to the frontface portion 101 a of the body chassis 101 is maintained. Moreover, inthe state in which the water-resistant box for electrical component 10is attached to the front face portion 101 a of the body chassis 101, theportion covered by the water-resistant box for electrical component 10,in other words, the recess 101 e of the front face portion 101 a of thebody chassis 101, is sealed by the water-resistant box for electricalcomponent 10. Note that the shapes of the protrusions 10 a and the holes10 b are not limited to the shapes illustrated in FIG. 4 .

For example, a service provider or the like removes the front cover 102and, in the state in which the water-resistant box for electricalcomponent 10 is attached as illustrated in FIG. 2A, washes the portionof the heat exchanger 105, the portion of the air supply passage, orother portions, where mold is likely to grow inside the indoor unit,with water by a high-pressure washing machine or the like.

Although the electrical components 20 are included inside the indoorunit, the electrical components 20 are entirely covered and sealed withthe water-resistant box for electrical component 10, and thus theelectrical components 20 are not wetted with water or the like.

In a case where the service provider or the like removes thewater-resistant box for electrical component 10 from the front faceportion 101 a of the body chassis 101, for example, by pressing theprotrusions 10 a and pulling out the water-resistant box for electricalcomponent 10 from the front face portion 101 a of the body chassis 101,the protrusions 10 a caught by snap-fitting are detached from the holes10 b, thereby allowing the water-resistant box for electrical component10 to be removed from the front face portion 101 a of the body chassis101.

Note that, here, as illustrated in FIG. 4 , a protrusion 10 a is formedon each of the left and right faces of the water-resistant box forelectrical component 10, and in a state in which the water-resistant boxfor electrical component 10 is attached, the protrusions 10 a are caughtby the holes 10 b formed at positions facing the protrusions 10 a of thefront face portion 101 a of the body chassis 101, however, this ismerely an example. For example, the protrusions 10 a may be formed onthe upper and lower faces of the water-resistant box for electricalcomponent 10.

Although two protrusions 10 a and two holes 10 b are included in thisexample, however, this is merely an example. For example, three or moresets of a protrusion 10 a and a hole 10 b may be included.

As described above, the water-resistant box for electrical component 10is detachably attached to the front face portion 101 a of the bodychassis 101 inside the body case 100.

By making the water-resistant box for electrical component 10detachable, for example, installation work of the indoor unit by aservice provider or the like can be simplified. Specifically, forexample, a service provider or the like needs to connect an electricwire drawn from a power source of a house to the electrical components20 included inside the indoor unit when installing the indoor unit. Theservice provider or the like removes the front cover 102 and connectsthe electric wire to the electrical components 20. At this point, if thewater-resistant box for electrical component 10 is attached, the work ofconnecting the electric wire and the electrical components 20 isdifficult. By making the water-resistant box for electrical component 10detachable, the service provider or the like can remove thewater-resistant box for electrical component 10 when installing theindoor unit and can easily connect the electric wire to the electricalcomponents 20.

Incidentally, the water-resistant box for electrical component 10 doesnot affect the operation of the indoor unit. That is, the indoor unitcan operate normally with or without the water-resistant box forelectrical component 10 attached. Therefore, for example, in a casewhere there is a market demand for cost reduction or the like, theindoor unit can be a product that does not include the water-resistantbox for electrical component 10 on the premise that the interior of theindoor unit is not suitable for washing with water or the like.

FIG. 5 is a cross-sectional view taken along line A-A in FIG. 2A. Notethat FIG. 5 is a cross-sectional view taken along line A-A of FIG. 2A asviewed from a side face on the side where the electrical components 20are included.

As illustrated in FIG. 5 , when viewed from the front face of the bodychassis 101, in other words, when viewed from the direction indicated byarrow 501 in FIG. 5 , a heat exhaust port 1011 is included in the bodychassis 101 on the back side with respect to the electrical components20.

More specifically, in the body chassis 101, in the front face portion101 a of the body chassis 101 covered with the water-resistant box forelectrical component 10 and in the top face portion 101 b of the bodychassis, a heat exhaust port 1011 a and a heat exhaust port 1011 b areformed, respectively.

Note that the heat exhaust port 1011 a is formed at a position outsidethe control board case 201 and the display board case 202 on the frontface portion 101 a of the body chassis 101 covered with thewater-resistant box for electrical component 10.

As described above, the control board 201 a generates heat. The heatgenerated from the control board 201 a is delivered to the outside ofthe control board case 201 through a gap or the like of the controlboard case 201, passes through the heat exhaust port 1011 a and theinterior of the body chassis 101, and is discharged to the outside ofthe indoor unit through the heat exhaust port 1011 b (see 502 in FIG. 5). As a result, in the indoor unit, the heat generated from theelectrical components 20, more specifically, the control board 201 a,can be exhausted from the interior thereof.

In addition, since the heat exhaust port 1011 is designed to be formedin the body chassis 101 on the back side with respect to the electricalcomponents 20 as viewed from the front face of the body chassis 101,water or the like does not enter the interior of the indoor unit fromthe heat exhaust port 1011 even in a case where a service provider orthe like washes portions of the heat exchanger 105 or the air supplypassage inside the indoor unit with water by, for example, ahigh-pressure washing machine. As a result, the electrical components 20are not wetted with water or the like.

As illustrated in FIG. 5 , the body chassis 101 includes protrusions1012 each having a shape protruding toward the internal space of thebody chassis 101 in the vicinity of the heat exhaust port 1011 of thebody chassis 101.

With the body chassis 101 having the protrusions 1012, it is possible toprevent water or the like from entering from the outside of the indoorunit along the wall face due by surface tension.

Note that, as illustrated in FIG. 5 , three protrusions 1012 are formedin this example. However, the number of the protrusions 1012 is notlimited to three.

In the first embodiment, the body chassis 101 has the protrusions 1012,however, this is merely an example. The body chassis 101 does notnecessarily have the protrusions 1012.

In the first embodiment described above, as illustrated in FIG. 2B, theelectrical components 20 are collectively provided at one place insidethe body case 100.

FIGS. 6A and 6B include diagrams for explaining a result of comparisonbetween an example of a conventional indoor unit in which electricalcomponents are dispersedly arranged inside a body case and an example ofthe indoor unit according to the first embodiment in which theelectrical components 20 are collectively arranged in one place insidethe body case 100.

FIG. 6A is a diagram illustrating the interior of the body case of theindoor unit in which the electrical components are dispersedly providedinside the body case, and FIG. 6B is a diagram illustrating the interiorof the body case 100 of the indoor unit according to the firstembodiment.

Note that FIGS. 6A and 6B are exemplary diagrams of the interior of thebody cases of the indoor units from which front covers are removed inthe installed state of the indoor units as viewed from the front sidesof the indoor units.

Conventionally, for example, as illustrated in FIG. 6A, there is knownan indoor unit in which a vane motor 601 for driving horizontal airflowdirection variable vanes and a vane motor 602 for driving verticalairflow direction variable vanes are arranged separately at ends in thewidth direction of the body case.

On the other hand, in the indoor unit according to the first embodiment,as illustrated in FIG. 6B, the motor for driving the horizontal airflowdirection variable vanes and the motor for driving the vertical airflowdirection variable vanes are integrated into one vane motor 204 insidethe body case 100. Moreover, in the indoor unit, the vane motor 204 andthe other electrical components 20 are collectively arranged in oneplace inside the body case 100. In this example, the electricalcomponents 20 are collectively arranged at the right end when the indoorunit is viewed from the front face portion 101 a of the body case 100inside the body case 100.

That is, as illustrated in FIG. 6B, in the indoor unit, a “water-washingarea” in which components required to be washed with water or the like,such as the heat exchanger 105 and the air passage (hereinafter referredto as “washing-required components”) and a “water resistance-requiredarea” in which the electrical components 20 that may lead to failurewhen wetted with water or the like are arranged are separated inside thebody case 100, and the water resistance-required area is disposed at oneplace.

Since the water resistance-required area is disposed at one place, inthe indoor unit, only one water-resistant box for electrical component10 is required.

Furthermore, in design, the indoor unit allows the widths of drains 603a and 603 b to be reduced as compared with the conventional indoor unitin which the vane motors 601 and 602 are arranged at a plurality ofplaces. As a result, the indoor unit can ensure accessibility from thefront for power source connection work when a service provider or thelike installs the indoor unit. In addition, the indoor unit does notrequire a harness 604 for connecting the plurality of vane motors 601and 602, which is necessary in the conventional indoor unit.

Note that, in the first embodiment, the indoor unit drives thehorizontal airflow direction variable vanes and the vertical airflowdirection variable vanes with the single vane motor 204, however, thisis merely an example. For example, the indoor unit may include a motorfor driving the horizontal airflow direction variable vanes and a motorfor driving the vertical airflow direction variable vanes. However, inthe indoor unit, the motor for driving the horizontal airflow directionvariable vanes and the motor for driving the vertical airflow directionvariable vanes are designed to be collectively arranged in one waterresistance-required area inside the body case 100.

Note that, in the first embodiment, there is one waterresistance-required area, but it is not essential that the number ofwater resistance-required area is one. For example, in a case where aplurality of water resistance-required areas is included in the indoorunit, the indoor unit includes as many water-resistant boxes forelectrical components 10 as the number of the water resistance-requiredareas.

In the first embodiment, the indoor unit includes the water-resistantbox for electrical component 10 separately from the control board case201 and the display board case 202 inside the body case 100 of theindoor unit. However, the water-resistant box for electrical component10 can also serve as the control board case 201 and the display boardcase 202. However, in this case, the water-resistant box for electricalcomponent 10 needs to be made of metal and be water-resistant.

A metal case is generally formed by cutting and bending a flat plate.Therefore, it is difficult to form a metal case without generating agap. In order to form a metal case without generating a gap, a mold, afixture, or the like for forming the metal case is required.

On the other hand, the water-resistant box for electrical component 10made of resin can be easily formed by molding.

As described in the first embodiment, with the water-resistant box forelectrical component 10 made of a resin member different from thecontrol board case 201 and the display board case 202, although thenumber of parts is increased, the cost and the labor of forming thewater-resistant box for electrical component 10 can be reduced.

As described above, according to the first embodiment, the wall-mountedair conditioner indoor unit 1 includes: the body case 100 including thebody chassis 101 to be attached to an indoor wall face and the frontcover 102 to detachably cover the body chassis 101; the electricalcomponents 20 provided on the front face portion 101 a of the bodychassis 101 inside the body case 100; the water-resistant box forelectrical component 10 to cover the electrical components 20 inside thebody case 100; and the heat exhaust port 1011 included in the bodychassis 101 on the back face side with respect to the electricalcomponents 20 as viewed from the front face of the body chassis 101.Therefore, in the wall-mounted air conditioner indoor unit 1, theelectrical components 20 can be prevented from getting wet with water orthe like when the interior thereof is washed with water or the like, andheat generated from the electrical components 20 can be discharged fromthe interior.

Note that it is possible to modify any component of the embodiment or toomit any component of the embodiment in the present disclosure.

INDUSTRIAL APPLICABILITY

A wall-mounted air conditioner indoor unit of the present disclosure isstructured in such a manner that electrical components are preventedfrom getting wet with water or the like when the interior is washed withwater or the like and that heat generated from the electrical componentsis discharged from the interior, and thus it can be applied to awall-mounted air conditioner indoor unit that allows washing with wateror the like.

REFERENCE SIGNS LIST

1: wall-mounted air conditioner indoor unit, 10: water-resistant box forelectrical component, 10 a: protrusion, 10 b: hole, 100: body case, 101:body chassis, 101 a: front face portion, 101 b: top face portion, 101 c:back face portion, 101 d: bottom face portion, 101 e: recess, 102: frontcover, 103: vane flap, 104: display unit, 20: electrical component, 201:control board case, 202: display board case, 203: fan motor, 204, 601,602: vane motor, 1011, 1011 a, 1011 b: heat exhaust port, 1012:protrusion

1. A wall-mounted air conditioner indoor unit, comprising: a body casecomprising a body chassis to be attached to an indoor wall face and afront cover to detachably cover the body chassis; an electricalcomponent provided on a front face portion of the body chassis insidethe body case; a water-resistant box for electrical component to coverthe electrical component inside the body case; and a heat exhaust portincluded in the body chassis on a back face side with respect to theelectrical component as viewed from a front face of the body chassis. 2.The wall-mounted air conditioner indoor unit according to claim 1,wherein the body chassis has a box shape, and the heat exhaust ports areformed in the body chassis on the front face portion of the body chassiswhere the water-resistant box for electrical component is covered and atop face portion of the body chassis.
 3. The wall-mounted airconditioner indoor unit according to claim 1, wherein thewater-resistant box for electrical component is detachably attached onthe front face portion of the body chassis inside the body case.
 4. Thewall-mounted air conditioner indoor unit according to claim 1, whereinthe electrical component includes a plurality of pieces of electricalcomponents, and the plurality of pieces of electrical components iscollectively provided at one place inside the body case.